java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label29_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 12:10:37,844 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 12:10:37,846 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 12:10:37,863 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 12:10:37,863 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 12:10:37,865 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 12:10:37,867 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 12:10:37,869 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 12:10:37,870 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 12:10:37,873 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 12:10:37,874 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 12:10:37,875 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 12:10:37,876 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 12:10:37,877 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 12:10:37,880 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 12:10:37,880 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 12:10:37,887 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 12:10:37,889 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 12:10:37,892 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 12:10:37,896 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 12:10:37,897 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 12:10:37,899 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 12:10:37,902 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 12:10:37,902 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 12:10:37,902 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 12:10:37,903 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 12:10:37,904 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 12:10:37,905 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 12:10:37,905 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 12:10:37,910 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 12:10:37,910 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 12:10:37,912 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 12:10:37,912 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 12:10:37,912 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 12:10:37,913 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 12:10:37,914 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 12:10:37,915 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 12:10:37,935 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 12:10:37,935 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 12:10:37,936 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 12:10:37,936 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 12:10:37,936 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 12:10:37,937 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 12:10:37,937 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 12:10:37,938 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 12:10:37,938 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 12:10:37,938 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 12:10:37,938 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 12:10:37,938 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 12:10:37,939 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 12:10:37,939 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 12:10:37,940 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 12:10:37,940 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 12:10:37,940 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 12:10:37,940 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 12:10:37,940 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 12:10:37,940 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 12:10:37,941 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 12:10:37,941 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 12:10:37,941 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 12:10:37,941 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 12:10:37,941 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 12:10:37,942 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 12:10:37,943 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 12:10:37,943 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 12:10:37,943 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 12:10:37,944 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 12:10:37,944 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 12:10:37,944 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 12:10:37,944 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 12:10:37,944 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 12:10:38,000 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 12:10:38,020 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 12:10:38,024 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 12:10:38,025 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 12:10:38,025 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 12:10:38,026 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label29_false-unreach-call.c [2018-10-27 12:10:38,088 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9ffe89cbf/dc4b8960087b47e2ad0e63ee3e61c4b6/FLAG98d7f961f [2018-10-27 12:10:38,963 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 12:10:38,964 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label29_false-unreach-call.c [2018-10-27 12:10:39,012 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9ffe89cbf/dc4b8960087b47e2ad0e63ee3e61c4b6/FLAG98d7f961f [2018-10-27 12:10:39,028 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9ffe89cbf/dc4b8960087b47e2ad0e63ee3e61c4b6 [2018-10-27 12:10:39,041 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 12:10:39,042 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 12:10:39,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 12:10:39,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 12:10:39,050 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 12:10:39,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:10:39" (1/1) ... [2018-10-27 12:10:39,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a3b48c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:39, skipping insertion in model container [2018-10-27 12:10:39,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:10:39" (1/1) ... [2018-10-27 12:10:39,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 12:10:39,331 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 12:10:41,471 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 12:10:41,478 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 12:10:42,647 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 12:10:42,703 INFO L193 MainTranslator]: Completed translation [2018-10-27 12:10:42,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:42 WrapperNode [2018-10-27 12:10:42,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 12:10:42,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 12:10:42,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 12:10:42,706 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 12:10:42,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:42" (1/1) ... [2018-10-27 12:10:42,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:42" (1/1) ... [2018-10-27 12:10:43,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 12:10:43,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 12:10:43,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 12:10:43,511 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 12:10:43,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:42" (1/1) ... [2018-10-27 12:10:43,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:42" (1/1) ... [2018-10-27 12:10:43,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:42" (1/1) ... [2018-10-27 12:10:43,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:42" (1/1) ... [2018-10-27 12:10:43,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:42" (1/1) ... [2018-10-27 12:10:43,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:42" (1/1) ... [2018-10-27 12:10:44,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:42" (1/1) ... [2018-10-27 12:10:44,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 12:10:44,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 12:10:44,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 12:10:44,186 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 12:10:44,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 12:10:44,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 12:10:44,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 12:10:44,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2018-10-27 12:10:44,259 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2018-10-27 12:10:44,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2018-10-27 12:10:44,259 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2018-10-27 12:10:44,260 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-27 12:10:44,260 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-27 12:10:44,260 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 12:10:44,260 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 12:10:44,260 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 12:10:44,261 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 12:10:44,261 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 12:10:44,262 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 12:10:44,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 12:10:44,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 12:10:44,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 12:10:44,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 12:11:02,931 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 12:11:02,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:11:02 BoogieIcfgContainer [2018-10-27 12:11:02,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 12:11:02,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 12:11:02,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 12:11:02,937 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 12:11:02,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:10:39" (1/3) ... [2018-10-27 12:11:02,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5951ca23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:11:02, skipping insertion in model container [2018-10-27 12:11:02,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:42" (2/3) ... [2018-10-27 12:11:02,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5951ca23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:11:02, skipping insertion in model container [2018-10-27 12:11:02,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:11:02" (3/3) ... [2018-10-27 12:11:02,941 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label29_false-unreach-call.c [2018-10-27 12:11:02,951 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 12:11:02,961 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 12:11:02,979 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 12:11:03,033 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 12:11:03,033 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 12:11:03,033 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 12:11:03,034 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 12:11:03,034 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 12:11:03,034 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 12:11:03,034 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 12:11:03,034 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 12:11:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states. [2018-10-27 12:11:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-27 12:11:03,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:11:03,096 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:11:03,098 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:11:03,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:11:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1784258372, now seen corresponding path program 1 times [2018-10-27 12:11:03,108 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:11:03,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:11:03,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:11:03,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:11:03,167 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:11:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:11:03,545 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 12:11:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:11:03,662 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:11:03,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 12:11:03,663 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:11:03,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 12:11:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 12:11:03,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 12:11:03,692 INFO L87 Difference]: Start difference. First operand 1778 states. Second operand 3 states. [2018-10-27 12:11:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:11:20,928 INFO L93 Difference]: Finished difference Result 4999 states and 9420 transitions. [2018-10-27 12:11:20,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 12:11:20,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2018-10-27 12:11:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:11:20,980 INFO L225 Difference]: With dead ends: 4999 [2018-10-27 12:11:20,980 INFO L226 Difference]: Without dead ends: 3219 [2018-10-27 12:11:20,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 12:11:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2018-10-27 12:11:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3215. [2018-10-27 12:11:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3215 states. [2018-10-27 12:11:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 5845 transitions. [2018-10-27 12:11:21,178 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 5845 transitions. Word has length 28 [2018-10-27 12:11:21,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:11:21,178 INFO L481 AbstractCegarLoop]: Abstraction has 3215 states and 5845 transitions. [2018-10-27 12:11:21,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 12:11:21,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 5845 transitions. [2018-10-27 12:11:21,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-27 12:11:21,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:11:21,185 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:11:21,185 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:11:21,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:11:21,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1452383789, now seen corresponding path program 1 times [2018-10-27 12:11:21,186 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:11:21,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:11:21,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:11:21,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:11:21,187 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:11:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:11:21,554 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 12:11:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:11:21,947 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:11:21,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 12:11:21,948 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:11:21,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 12:11:21,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 12:11:21,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 12:11:21,951 INFO L87 Difference]: Start difference. First operand 3215 states and 5845 transitions. Second operand 6 states. [2018-10-27 12:11:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:11:55,811 INFO L93 Difference]: Finished difference Result 9343 states and 16923 transitions. [2018-10-27 12:11:55,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 12:11:55,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2018-10-27 12:11:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:11:55,856 INFO L225 Difference]: With dead ends: 9343 [2018-10-27 12:11:55,856 INFO L226 Difference]: Without dead ends: 6134 [2018-10-27 12:11:55,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 12:11:55,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2018-10-27 12:11:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 6093. [2018-10-27 12:11:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6093 states. [2018-10-27 12:11:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6093 states to 6093 states and 9626 transitions. [2018-10-27 12:11:56,043 INFO L78 Accepts]: Start accepts. Automaton has 6093 states and 9626 transitions. Word has length 100 [2018-10-27 12:11:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:11:56,044 INFO L481 AbstractCegarLoop]: Abstraction has 6093 states and 9626 transitions. [2018-10-27 12:11:56,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 12:11:56,044 INFO L276 IsEmpty]: Start isEmpty. Operand 6093 states and 9626 transitions. [2018-10-27 12:11:56,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-27 12:11:56,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:11:56,056 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:11:56,057 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:11:56,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:11:56,057 INFO L82 PathProgramCache]: Analyzing trace with hash 299475857, now seen corresponding path program 1 times [2018-10-27 12:11:56,057 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:11:56,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:11:56,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:11:56,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:11:56,059 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:11:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:11:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:11:56,346 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:11:56,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 12:11:56,347 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:11:56,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 12:11:56,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 12:11:56,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 12:11:56,348 INFO L87 Difference]: Start difference. First operand 6093 states and 9626 transitions. Second operand 6 states. [2018-10-27 12:12:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:12:45,136 INFO L93 Difference]: Finished difference Result 24259 states and 39728 transitions. [2018-10-27 12:12:45,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 12:12:45,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2018-10-27 12:12:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:12:45,230 INFO L225 Difference]: With dead ends: 24259 [2018-10-27 12:12:45,231 INFO L226 Difference]: Without dead ends: 18172 [2018-10-27 12:12:45,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-27 12:12:45,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18172 states. [2018-10-27 12:12:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18172 to 18098. [2018-10-27 12:12:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18098 states. [2018-10-27 12:12:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18098 states to 18098 states and 25640 transitions. [2018-10-27 12:12:45,790 INFO L78 Accepts]: Start accepts. Automaton has 18098 states and 25640 transitions. Word has length 118 [2018-10-27 12:12:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:12:45,790 INFO L481 AbstractCegarLoop]: Abstraction has 18098 states and 25640 transitions. [2018-10-27 12:12:45,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 12:12:45,792 INFO L276 IsEmpty]: Start isEmpty. Operand 18098 states and 25640 transitions. [2018-10-27 12:12:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-27 12:12:45,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:12:45,809 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:12:45,809 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:12:45,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:12:45,810 INFO L82 PathProgramCache]: Analyzing trace with hash -483353840, now seen corresponding path program 1 times [2018-10-27 12:12:45,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:12:45,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:12:45,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:12:45,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:12:45,811 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:12:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:12:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:12:46,254 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:12:46,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 12:12:46,255 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:12:46,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 12:12:46,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 12:12:46,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 12:12:46,256 INFO L87 Difference]: Start difference. First operand 18098 states and 25640 transitions. Second operand 5 states. [2018-10-27 12:13:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:13:15,157 INFO L93 Difference]: Finished difference Result 56361 states and 85035 transitions. [2018-10-27 12:13:15,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 12:13:15,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2018-10-27 12:13:15,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:13:15,340 INFO L225 Difference]: With dead ends: 56361 [2018-10-27 12:13:15,340 INFO L226 Difference]: Without dead ends: 38269 [2018-10-27 12:13:15,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 12:13:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38269 states. [2018-10-27 12:13:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38269 to 37201. [2018-10-27 12:13:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37201 states. [2018-10-27 12:13:16,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37201 states to 37201 states and 50449 transitions. [2018-10-27 12:13:16,267 INFO L78 Accepts]: Start accepts. Automaton has 37201 states and 50449 transitions. Word has length 163 [2018-10-27 12:13:16,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:13:16,267 INFO L481 AbstractCegarLoop]: Abstraction has 37201 states and 50449 transitions. [2018-10-27 12:13:16,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 12:13:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 37201 states and 50449 transitions. [2018-10-27 12:13:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-27 12:13:16,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:13:16,274 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:13:16,274 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:13:16,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:13:16,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1157490002, now seen corresponding path program 1 times [2018-10-27 12:13:16,277 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:13:16,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:13:16,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:13:16,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:13:16,279 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:13:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:13:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 42 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 12:13:16,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:13:16,781 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:13:16,782 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 184 with the following transitions: [2018-10-27 12:13:16,784 INFO L202 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5350], [5352], [5355], [5363], [5371], [5379], [5387], [5395], [5403], [5411], [5419], [5427], [5435], [5443], [5451], [5459], [5467], [5475], [5483], [5491], [5499], [5507], [5515], [5523], [5531], [5539], [5547], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5727], [5731], [5742], [5745], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5781], [6802], [6806], [6810], [6816], [6820], [6822], [6837], [6838], [6839], [6841], [6842] [2018-10-27 12:13:16,857 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:13:16,858 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:13:17,376 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 12:13:17,379 INFO L272 AbstractInterpreter]: Visited 87 different actions 87 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-27 12:13:17,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:13:17,420 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 12:13:18,158 INFO L227 lantSequenceWeakener]: Weakened 174 states. On average, predicates are now at 75.14% of their original sizes. [2018-10-27 12:13:18,158 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 12:13:18,304 INFO L415 sIntCurrentIteration]: We unified 182 AI predicates to 182 [2018-10-27 12:13:18,304 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 12:13:18,305 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 12:13:18,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-10-27 12:13:18,305 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:13:18,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 12:13:18,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 12:13:18,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-27 12:13:18,307 INFO L87 Difference]: Start difference. First operand 37201 states and 50449 transitions. Second operand 7 states. [2018-10-27 12:13:21,823 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown